Rather interestingly, I migrated from four "big name" other NMS solutions to NetXMS.
Today we had a major power spike across the metro area - ORION - asleep at the wheel, overloaded by bloated functions, NetXMS - my Up/Down dashboard - 1 minute auto refresh - loved by all.
NetXMS has its nuances, but for us, today demonstrated that NetXMS can easy hold its own, and more, for standard NMS and SNMP based monitoring.